Mechanism for pressing charges of molten glass in a forming mold



Aug. 3, 1965 R. R. DENMAN ETAL 3,198,617

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 10 Sheets-Sheet 1 :D. TJI/A/U r ATTORNEYS 1965 R. R. DENMAN ETAL 3,198,617

MECHANISM FOR PRESSING CHARGES 0F MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 10 Sheets-Sheet 2 3. Fla/M5 z J 1/97 50 wo /a);

1965 R. R. DENMAN ETAL 3,198,617

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed 001:. 8, 1959 10 Sheets-Sheet 5 I N V EN TORS POE'EET'PDEA/MHA/ as b! MuMFaED A ORNE Y5 Aug. 3, 1965 R. R. DENMAN ETAL 3,198,617

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 1,0 Sheets-Sheet 4 INVENTORS 8954-272 FEM/09M ElB Y574C// MVMFQZP 3. TIA/m5 z J12. A/fzsa/ A TTOQNE YS Aug. 3, 1965 R. R. DENMAN ETAL 3,193,617

MECHANISM FOR PRESSING CHARGES 0F MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 10 Sheets-Sheet 5 A TTORNEYS Aug. 3, 1965 R. R. DENMAN ETAL 3,198,617

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 1,0 Sheets-Sheet 7 Q4 1 o o 1 19- 32 I Fig. l U INVENTOR5 Aug. 3, 1965 R. R. DENMAN ETAL 3,

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 10 Sheets-Sheet 8 .4 62 5 I a 33 E15 45 1 INVENTORS ,ZnififKDFM/Ws 9,- 1 1 I By KJEWC'KM/IWMKQKO :D TIA/M5 3 71' 7 55 %a 7? J@ M5650 1965 R. R. DENMAN ETAL 3,198,617

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8. 1959 l -s eet 9 ATTOQNEYS Aug. 3, 1965 R. R. DENMAN ETAL 3,193,617

MECHANISM FOR PRESSING CHARGES OF MOLTEN GLASS IN A FORMING MOLD Original Filed Oct. 8, 1959 10 Sheets-Sheet 10 ATTORNEYS 3,198,617 M'EQHANISM ESP. PRESfilNG CHARGES F MULTEN GLAS El A FGRBWG MGLD Robert R. Denrnan, Toledo, Ghio, and Eustace H. Mumford, @ttawa Lake, Mich, assignors to @WGIllS-IliilllOlS Glass Company, a corporation of @hio (Icntinuation of application Ser. No. 845,238, (let. 8, 193?. This application Get. 4, 1960, Ser. No. 60,416 4 Ciaims. (Cl. 65-207) This application is a continuation of applicants copending application Ser. No. 845,238, filed October 8, 1959, now abandoned.

The present invention relates to glass forming and shaping mechanisms, and in particular to mechanisms for delivering charges of molten glass to parison shaping molds and the shaping of such charges therein. Such shaping may be performed either by ressing a parison from which a final article may be ultimately blown or the pressing of a final shaped article.

In the present day machines of the gob-fed type, it is the usual procedure to charge the mold by one of the two methods, (:1) deliver the gob to the mold at the statron preceding the pressing thereof, or (2) by charging the mold at the pressing station with a side or deflected delivery of the gob to the mold. The inherent difficulty of the first method (1) is that the gob must rest in physical contact with the walls of the mold for an undue period of time and is therefore subjected to an excessive and detrimental chill prior to pressing. In the second method (2), the plunger is above and in alignment with the mold cavity at the time of delivery of the gob to the mold, thus making tr e side or deflected delivery of the charge mandatory. Furthermore, the deflected delivery of the gob presents not only unequal chilling but also the uncontrolled collapsing of the gob in the :mold in such manner as to entrap air and chilled skin portions which will not disappear during the pressing operation and which will inherently result in detrimental marks in the finished ware.

In the present invention, the charges of molten glass will be delivered to a press mold at the pressing station by being delivered downwardly through the main gob guide system which will always remain in vertical alignment with a vertical path passing through the vertical axis of the mold cavity at the pressing position, thus insuring accurate central delivery of the gob to the mold cavity. The gob will be delivered directly through that vertical zone or path, which in the usual form of machines of this type, is normally occupied by the pressing plunger. The charge will then be immediately'pressed into shape at this receiving station by bringing the plunger into said vertical path and moving it downwardly therein directly behind the downwardly moving gob to thus bring the plunger into contact with the molten glass in the mold immediately upon the establishment of contact between the mold and glass and without any appreciable delay between the delivery of the gob and pressing thereof. The above described operation is accomplished by the provision of a combined delivery and pressing mechanism comprised of the gob guide and pressing plunger, both of which are so arranged so as to cooperate to form a complete pressing unit.

It is the primary object of this invention to provide. a mechanism capable of a high degree of flexibility to permit rapid actuation thereof, as well as full overlap of the operative movements of the various mechanisms to thus permit an improved high speed of production of finished ware.

A further object is the utilization of a plurality of like mechanisms adapted for overlap movements for a high ired States Patent 0 3,198,617 Patented Aug. 3, 1965 It is still a further object of this invention to provide apparatus for shaping successive charges of molten glass into finished ware of high quality and at high speeds of;

production. 7

Other objects will be apparent from the following descriptive matter taken in conjunction with the drawings wherein:

FIG. 1 is an elevational and perspective view of a machine unit embodying the invention;

FIG. 2 is a schematic plan view of a portion of the upper structure of this mechanism and illustrates the gob guides and plunger shifting mechanism;

FIG. 3 is also a plan view of another portion of the upper structure and illustrates the timing cam drum and its drive;

FIG. 4 is a sectional elevational view through one of the gob guides taken at line 44 on FIG. 2 and illustrates the actuating pistons for imparting vertical motion to the pressing plungers and the fluid connections therefore;

FIG. 5 is a sectional elevation taken at line 55 on FIG. 2 and illustrates the fluid driving control mechanism for shifting the pressing plungers horizontally to and from pressing position;

FIG. 6 is a sectional detail view taken at line 66 on FIG. 2 and illustrates the adjustability of the control mechanism of FIG. 5;

FIG. 7 is a part sectional elevation of the lower portion of the pressing mechanism and illustrates the horizontal slide mounting and operating mechanism for shifting the plungers;

PEG. 8 is a rear elevation of the shifting mechanism support for the auxiliary gob guide sections and mold spray mechanism;

FIG. 9 is a sectional detail of a fluid pressure operated detent for retaining the press plungers in up position and is taken at line 9-9 on FIG. 8;

FIG. 10 is a sectional elevation taken at line lit-10 on FIGS. 2 and 8, and illustrates the gob guide shifting mechanism and the mounting for the int rmediate guides;

FIG. 11 is a bottom view of the press plunger and gob guide shifting mechanism;

FIG. 12 is an inverted sectional view taken at line 12-12 on FIG. 11 and illustrates the connections for transmitting cooling fluids from the slideway to the slides carrying the press plungers and to the plungers;

FIG. 13 is also an inverted sectional view taken at line 1313 on FIG. 11 and illustrates the resilient moun ing as between the pressing plunger slideways;

FIG. 14 is a schematic view illustrating the several mechanical steps involved in forming glass with this present mechanism;

FIG. 15 is a schematic view of the fluid pressure system of this mechanism; and

FIG. 16 is an enlarged view of the upstroke snubbing control or regulating valve of the pressure system of FIG. 15, butshown in its alternate position.

The accompanying drawings illustrate the present invention as a mechanism for use in a plural mold, double gob operation in the pressing of glass articles or parisons for producing blown containers by a press-and-blow process. However, this invention is not to be limited to use in double gob operation as it may also be applied to single mold and single gob operation. In addition, this invention is also applicable to the pressing of finished glass articles in either a single or double cavity pressing process for'production of pressed ware.

As illustrated, there is disclosed the conventional glass feeder of the double-gob type, said feed-er arranged to simultaneously deliver a plurality of gobs to gob guides, sections of which are vertically disposed with their longiincrease in both quality of ware and of production there- 53 tudinal axis in side-by-side arrangement. The vertically disposed section of the gob guides directs gobs downwardly through the upper structure of the forming machine.

These vertical gob guide sections are permanently positioned at a glass forming station and are arranged for cooperation with vertically reciprocating sleeve members which form a part of the plunger supporting mechanism. These sleeves are provided at their lower ends with horizontally disposed slideways in each of which is mounted a slide carrying a vertically disposed plunger. These plungers are arranged in side-by-side relationship corresponding to and having axes parallel to the axes of the vertical gob guide sections. Each said slide member is adapted for horizontal reciprocation in order to provide a means whereby both said plungers may be moved alternately into and out of vertical alignment with the axes of the gob guide sections.

Positioned beneath the gob guides and plungers is a glass shaping or parison mold which is also provided with plural cavities and with the vertical axis of each cavity thereof in alignment with the vertical axis of a vertical gob guide section. The vertical gob guides and the parison mold cavities always remain at the forming station and in vertical alignment with each other, but they are so mounted as to be capable of relative movement with respect to each other along their aligned vertical axes.

A neck mold turret is provided for carrying a series of sets of plural cavitied neck molds, with each set thereof equally spaced about the circumference of the turret. The turret is arranged for step-by-step rotation about a vertical axis to bring each set of neck molds successively into alignment with the aligned vertical axes of said guides and parison mold cavities and interposed said guides and parison cavities.

With the positioning of a set of neck molds at the forming station, the gob feeder severs and drops a plurality of gobs into the gob guides and the vertical sections thereof will guide them into their respective parison mold cavities. The vertically disposed pressing plungers are then moved horizontally along their respective horizontal slideways to bring each of them into alignment with the vertical axes of the stationary gob guides, the neck cavities and parison mold cavities, preparatory to pressing the gobs in said mold cavities. When the plungers are thus vertically aligned, the sleeve members will be moved telescopically downward with respect to the stationary gob guides and carry the plungers therewith. In the meantime, the parison mold has been moving upwardly until it is in contact with the lower surface of the neck molds where it comes to rest. The plungers continue to move down to a position where they extend through the neck molds and into the parison mold cavities, thereby displacing the molten glass in each parison mold cavity upwardly along its length and into the neck mold to form hollow parisons having a bead or neck finish on the upper end thereof.

With the completion of the pressing operation, the parison mold is moved downwardly, leaving the pressed parisons pendant from the neck molds. Simultaneously therewith, the plungers move upward and then horizontally out of alignment with the axes of the vertical gob guides and parison mold cavities. When the plunger ends have cleared the neck molds and the parison mold is below the bottom of the parisons, the neck mold turret is indexed, moving the neck molds and their pendant parisons horizontally to the blowing station.

As the neck molds and their parisons reach the blowing station, a succeeding set or pair of neck molds is simultaneously being positioned beneath the vertical gob guides and the parison mold has already begun to move upward into contact with this new set of neck molds. Just prior to the time that the parison mold contacts the set of neck molds, a succeeding set of gobs will be severed and deposited in the parison mold cavities for the next pressing operation. The above described operations will then be repeated in succession and in a controlled and timed order.

The timing, as between each phase of the forming operations, is such that full overlap of operations is obtained. For example, just as the severing of the gobs is completed, the parison mold will have just about come to rest in aligned contact with the neck molds, the pressing plungers will be ready for motion horizontally so that, at the approximate instant the gob reaches the bottom of the parison mold cavity, the plunger individual thereto will be in vertical alignment between the vertical gob guide and the mold cavity and is ready to, if not already, move down to the pressing position at the pressing station. In the succeeding phases of operation the plunger and mold cavities will move vertically away from each other, the plungers will move horizontally out of alignment, while at the same time the neck molds are moving to the next station. The next gobs are being formed and suspended for severing while the succeeding neck molds are moving into alignment with the guides and parison molds. The parison mold is on its way up to meet the succeeding neck molds as they come to rest at the forming or pressing station and the suspended gobs are being severed for the next parison formation.

With reference to the drawings and in particular to FIG. 1 thereof, there is illustrated therein a conventional feeder it) having a reciprocating plunger 11, a double blade cutting shear 12 and a shear actuating cylinder 13.

Beneath the feeder 10 is positioned a forming machine generally designated 14. The forming machine is comprised of a base 15, vertical uprights 16 and .17 upon which is mounted an upper structure support member 18 and a covering cap member 19.

Extending downwardly from the support member 18 is a vertically disposed bearing bracket 20 arranged to support a vertically disposed drive shaft 21 upon the lower end of which is mounted a neck mold carrying turret 22. This turret carries or supports a plurality of sets of neck molds 23, each set being equally spaced circumferentially thereof, and the turret is arranged to transport these neck molds 23 from a forming station to a blowing station and thence to a ware takeout station in succession.

A parison mold 24 is located at the forming station and is arranged for vertical reciprocation to and from contact with the neck molds 23 on the turret 22. The parison mold 24 is provided with side-by-side shaping cavities 25 and is mounted upon a parison mold holder 26 attached to the upper end of a vertically disposed piston rod 27. This piston rod 27 and its piston 28 are arranged for reciprocation in a vertical cylinder 29. Fluid for operating the piston 28 is supplied to cylinder 29 through conduits 30 and 31 which are alternately connected to a suitable source of pressure fluid.

A pair of glass pressing plungers 32 are mounted in horizontal slideways 33 for reciprocation into and out of vertical alignment with the parison mold cavities 25 and are also arranged for vertical reciprocation to and from glass pressing relationship with respect to the parison molds 24.

A split finishing mold 34 (shown open in FIG. 1) with cooperating bottom plates 35 are provided at the blowing station. A ware lowering device 36 and a hydraulic ware transfer device 37 are provided at the takeout station to position the finished ware on a continuous belt conveyor 38.

The neck mold turret 22 is arranged to be driven by a hydraulic driving unit 21a arranged upon the upper end of the drive shaft 21 (FIG. 2). This driving unit, which does not form the novel part of this present invention, is specifically illustrated and described in a copending application Serial No. 806,957, filed April 16, 1959, now Patent No. 3,009,444, dated November 21, 1961, and

reference may be had thereto for full details of this drive mechanism. Essentially, this drive unit consists of a rotor fixed to the drive shaft 21 and enclosed in a rotor casin The rotor and casing are arranged for successive intermittent rotation about the same axis and in the same direction, thereby providing a mechanism which will index the turret 22 step-by-step and present the several sets of neck molds 23 successively to the successive stations, namely, the forming or pressing station, the blowing station and the takeout station.

The gob feeding and guiding devices of this machine include the shearing mechanism 12 and 13 adapted to simultaneously sever a plurality of gobs 39 and drop them into a multisectioned guide device. This guide device consists of curved sections 4% which receive the gobs 3% as they are dropped and direct them to straight inclined sections 41. The inclined sections 41 guide the gobs into deflector sections 42 which in turn deliver the gobs to vertically disposed stationary gob guide sections 43.

The guide sections 41, 42 and 43 are permanently retained stationary in the positions shown in FIGS. 1, 4, and 14 and the curved sections 4% may be movable into and out of register with the inclined sections The gob deflector sections 42 are attached by a flange 4 to the upper surface of the covering cap member 19 of the upper structure support member 18 (FIG. 4), and the vertical guide sections 43 are in turn attached to, as at 45, and suspended from the deflector sections 42.

Referring specifically to FIGS. 4 and 7, where the mounting arrangement for the plungers is shown, it should be kept in mind that there are two plungers and that both plungers will be similarly mounted in side-byside relationship.

A pair or" vertical guide sections 43 are positioned coanially within a pair of tubular sleeve members 46 which are disposed in side-by-side relationship and adapted for vertical movement. The tubular sleeve members 46 serve in the capacity of mechanical guides for plungers 32 during vertical movement thereof.

The tubular sl eve members 46 are mounted in a vertically disposed bearing housing 47 formed as an integral part of the upper structure support member 18. A central bore 48 for each sleeve 45 is formed in the bearing housing 47 into which is fitted ball bearing bushings These bearing bushings not only surround, but they also act as a guide for the sleeve member 46 and reduce the friction to a minimum in this igh speed operating mechanism.

Formed on the lower end of each sleeve 46 and as an integral part thereof is the horizontally disposed slideways 23, each said slideway having mounted for sliding movement therein, a slide 53 and each slide is adapted to carry a glass shaping plunger 3-2. Also mounted in the vertical bearing housing 47' and individual to each slideway 33 are pairs of hollow, piston-like members 5; and 52 (A 568. 2 and 4). These members are attached to each slideway 33 by threaded fasteners 53 and are slid-able in axially aligned vertical bores 54 and 55 respectively formed in the bearing housing 4-7 and an overlying support member 56. By reference to PEG. 2, it will be noted that there are two identical piston-like members 51 and two identical piston-like members 52, one for each slideway 33, and are arranged to apply vertical movement and pressure to the plunger slideway Two additional pistondilre members 57 are also provided, one for each slideway 33, and which are telescopically received in a conduit 58 fixed in the support structure 13. The conduits 53 are connected to a passageway 5? in a fitting 61 which in turn is connected to a conduit 61 (P163. 4 and 6) and thence to a mufier system through conduit 62.

The pair of piston like members 57 which are provided one each to each slideway 33, are attached to each said slideway by the same means and in the same manner as previously described with respect to the members 51 and g 52, namely, by screw-threaded members 63, asshown in FIG. 4.

By reference to FIGS. 2 and 4, it will be found that each slideway 333 has two pressure pistons attached thereto, namely, pistons 51 and 5'2, so that glass pressing pre sure is applicable at equally spaced points from the center of the plunger 32 when same is brought to the glass pressing station. in addition, each slideway member 33 is provided with a piston-like member 57, which is arranged as a fluid exhaust channel (FIG. 4).

Referring now to FIGS. 7 and 11, it can be seen that each slide 5% has mounted thereon a glass pressing plunger 32 and each plunger is attached to the slide by a screw memberd i having a tapered end 65 which is adapted to pull the shank 66 of the plunger 32 into the shank socket or formed in the slide 50. Each slideway 33 is arranged to have limited vertical float relative to the other to thereby permit each plunger 32 to seat in the glass independently of the other when pressing the glass in the parison mold cavities 25. This float is provided by having, in the opposed side surfaces of the slideways.

33 (FIGS. 11 and 12) cut-out-port-ions 68 and 69 into which keys 763 and '71 respectively fit. These keys may be formed as an integral'part of their respective slideways 33. Thus, as shown in PEG. 12, the key 70 can move vertically in cut-out-portion 63 and key 71 can move vertically in cut-out portion 69, thus permitting relative vertical movement of each slideway 33 to a limited extent. As best illustrated in FIG. 13, a spring Fla is provided between the slideways 33 to maintain said slideways in parallel relationship when no pressing force is being applied. in addition, each slide 56 is connected to the other for coordinate horizontal movement by tongue 72 and groove 73 formed respectively on crossmembers '74 and *75 attached to the lower faces of each slide 5% The clearance between the tongue 72 and groove i3 will permit freedom of horizontal alignment to each individual plunger 32.

Provision is made for applying a fluid coolant toeach plunger 32 by the introduction of such coolant through a conduit 76 (FIG. 4) connected to the vertical bore 55 in the overlying support member 56. The fluid will flow from the bore 55 into the open upper end 77 of the piston 51, thence through a passageway 70 in slideway 33 to a chamber 29 (FIG. 12) formed in the slideway 33. Overlying the chamber 79 is a port 81) formed in slide 33. The port it communicates with a passageway 81 to convey the cooling fluid to the inside of the plunger 32. Within the chamber 79, there is an annular sealing ring $2 which is biased by a spring 23 against the top of the slide 5% to prevent leakage of the coolant between the abutting faces of the slide and slideway. The coolant, after passing into the inside of the plungers 32, returns through a passageway st in alignment with a port 35 in slide 50. The port 35 is in communication with a passageway 86, extending through the slide 5% and is in alignment with a second chamber formed in the slideway 33. A passageway id connects the chamber 87 to the lower open end $9 of the piston-like members 57 (FIG. 4) from which the coolant is exhausted. s

As previously mentioned herein, the plungers 32, besides being vertically movable to and from a press station, are also horizontally movable to and from a position in vertical alignment withthe parison mold cavities 25 and the neck molds 23 for pressing operation. Whenever the plungers 23 are moved horizontally, a pair of intermediate gob guides 93 will also move horizontally into and out of alignment with the vertical gob guide sections 43 and the blank mold cavities 25. In other words, the intermediate gob guide sections 93 alternate with the plungers 32 in moving into and out of alignment between the vertical gob guide sections 43 and the blank mold cavities 25. The intermediate 'gob guides Kl are provided to insure that the gobs 39 are loaded properly in the parison mold cavities 25. In a sense, they bridge the gap between the vertical gob guide sections 43 and the neck molds 23 during delivery of the gobs 39.

The intermediate gob guides 99 (FIGS. 8, 10 and 14) move horizontally in timed sequence with respect to the horizontal movement of the slides t and their attached plungers 32. This movement of the intermediate gob guides 90 is provided through the following mechanism. A horizontal slideway 971 is forced on the lower end of a bracket 92 which depends from the under side of the upper structure support member (FIG-S. 9 and A slide member 93 is mounted in the slideway 91 and adapted to slide relative thereto. The slide member 93 is arranged to be reciprocated horizontally and carries the intermediate gob guides therewith. The horizontal slide member 93 has a cam slot 9- therein into which a cam roller 95 is adapted to ride. The cam roller 9:? is connected to one end of lever 96 which is in turn connected to a vertical drive shaft 97. The vertical drive shaft 97 extends from the slide member upward through the bracket 9'2 and the upper structure support member 18 and has its upper end supported in a bearing 93 carried by the overlying support member 56. The upper end of drive shaft 97 carries a pinion 99 rigidly attached thereto and arranged to mesh with teeth 1230 on one end of a horizontally disposed rack 1M (F168. 2 and 10).

With reference to FIGS. 7 and 11, a description of the mechanism for effecting horizontal movement of the slides 59 and their attached plungers 32 will be given. The cross member 75 has a cam slot T532 formed in its upper surface and which receives a cam roller Th3 mounted on the lower face of a lever 164, attached to a vertical drive shaft 105. The vertical drive shaft 1G5 is rotatably supported at its lower end in a bearing we, fixed in a support member 107. The support member 1427 is fixed to one of the slid-sways 33 and moved therewith during the vertical reciprocation of same to and from the pressing operation.

It should be apparent by observation of FIG. 11 that the rotation of shaft 105 and consequently lever TM, in a counterclockwise direction, will serve to move the crossmembersi l and 75, the slides and the plungers 32 to the right or out of vertical alignment with the parison mold cavities 25 and stationary gob guide sections 43.

The rotation of shaft 195 is effected through a pair of piston driven power racks 10S and 169 which are also mounted in support member 56 in such a manner as to mesh with a gear 110, on opposite sides thereof (FIGS. 2, 5 and 7). These power racks 1538 and 1439 which are horizontally slidable in support member 56, are so arranged as to always remain in mesh with gear 118 and thus provide alternate driving of gear 118 and a controlled resistance thereto for the prevention of back lash or lost motion.

Shaft 195 is vertically slidable in the support member 56 and is also slidable vertically in the gear 119 which is mounted in the support member 56. This gear and shaft 165 are interconnected through a splined connection 111 and spline key 112.

The rack 101 extends horizontally across the top of the support member and is provided on one end with teeth 113 which mesh with the gear lit) mounted on and attached to the upper end of shaft 195. The rack Till thus provides an interconnection between shafts 195 and 97. The power racks 168 and 1519 will drive both vertical shafts 1&5 and 97 simultaneously to thereby shift the plungers 32 and the intermediate gob guides horizontally in the same time sequence.

In order to control the vertical, reciprocating movements of the plungers 32 and slideways 33, a mechanism has been provided for automaticallyregulating ther'iow of fluid pressure to and from the pistons 51 and 52. This S mechanism is constructed and operated as follows with reference to FIGS. 2, 5 and 6.

A bearing bracket 11 i is mounted on the upper surface of support member and supports a lever 115 for rocking motion about a horizontal shaft 136. One end of lever T15 supports a roler i which has rolling engagement with vertical shaft Th5 and through this shaft engagement provides rocking motion to lever 115 whenever shaft 1% is reciprocated. The bracket 114 is mounted within a second bracket 113, the side walls 119 and 12a) of which prevent the bracket 114 from having any rotary or turning motion during vertical adjustment of said bracket 13 3. This bracket lid is adjustable for the purpose of changing the vertical position of the hori- "ontal shaft 116 and thereby vary the point at winch conact will be established as between shaft 135 and roller T 1e positic of shaft no is adjusted through rotaof a pair of miter gears 121 and a pinion 122 in with a gear 123 threadedly connected to a shaft t supports the bracket 114. A spring 125 is positron beneath bracket 11 iand tends to assist in the raisthe bracket when a ustment is being made. As can readily be seen when vww ng FIG. 6, rotation of an input shaft will rotate miter gears 121 resulting in rotation of pinion 123.. As the pinion 122 is rotated it will mesh with and drive the internally threaded gear 123 resulting in vertical displacement of the bearing bracket 114 with respect to the support member 56.

Attached to the end opposite the roller 117 of lever is a link 327 which interconnects lever 115 and a vertically reciprocable snubber valve 128. Valve 128 is isposed in extension 129 of support member 5-3, is, in effect, an integral part of member 5-5. A cap fixed to the extension 329 at the upper end of the valve 128 provi es a stop for the upward movement of the snubber valve and a pin 131 at the lower end of 7 provides a constant lifting force to this valve valve 123 through the admission of constant pressure to a chamber 132 beneath pin The snubber valve 3.23 is provided with relieved portions E333 and 134, which control the flow of operating fluid to the pistons 51 and 52 and also a pair of flat fluid feathering spots 135' and 136 are provided thereon for fine control and for pressure relief. The snubber valve 123 being interconnected. to shaft 134, thereby provided means for snubbing the upward movement of the slides 33 and their respective plungers 32 as one part of its function. Furthermore, it acts to prevent vibration and excessive wear of the plunger c erating mechanism.

Also mounted in support member 56 is a slide valve $137 which is horizontally d posed and is biased by a spring 138 at one end to generally maintain this valve in the position opposite to that shown in FIG. 5 to retain the plungers 32 in their up position. The valve 137 is relieved at 139 and Fr tz; to permit fiow of fluid from a main supply line 1 31 alternately to conduits T42 and 143 and to exhaust fiuid from these same conduits in alternation. The shifting valve 137 in one direction is accomplished by providing fluid to the end opposite to the spring 1 through conduit 1 only after the power rack 168 has been shifted to bring the plungers 32 in vertical alignment with the parison mold cavities 25 (FIG. 15). The shifting of valve 137 will control the supply of fluid above or beneath the pistons 51 and 552 for raising and lowering the plungers It will be noted that the actuation of the power racks 1% and if is under control of main cam 145, of a cam drum 145 (PEG. 3) and that the slide valve 137 is inoperative in the absence of operation of the power racks and 1&9, and snubbcr valve 123.

The main cam drum i i-6 is provided on its outer cylindrical surface E i-7 with a series of groups of vertically spaced cam sectors, each group being comprised of a pair of cam plates and with each pair individual to a mechanical group. For example, cams 145 and 145a are individual to the mechanical groups for actuating the mechanisms which move the plungers 32 both horizontally and vertically.

The cam drum 146 is mounted for rotation about a vertical shaft 148, which in turn, is mounted in a bearing formed in the upper structure support member 18. A gear 149 is attached to the lower end of the drum 1% and is driven by a pinion gear 15% mounted on the upper end of a vertical shaft 151. A worm gear 152, mounted on the lower end of the shaft 151 is driven by a worm 53 attached to a drive shaft 154. A variable speed motor 155 drives the drive shaft 154 through a suitable gear train thus providing rotation of cam drum 137. The speed of motor 155 is synchronized with the motor drive of the feeder 19. While FIG. 3 shows only a single group or pair of cams 145 and 145a, it should be pointed out that the cam drum 1 :5 carries an additional number of groups of cams which operate valves for turret index control, dead plate ware control, blow mold control and control of the parison mold movement.

The valves for effecting the above mentioned operations are contained within a vertically disposed valve block 155, mounted on and within the upper structure support member 18. For example, a control valve 157 has a spool portion 158 which is relieved at 159 and 160. This valve is the control for actuating the mechanisms which move the plungers 32 horizontally and vertically. Thus, it can be seen that rotation of the cam drum 146 will result in reciprocatory movement of control valve 157 into and out of the valve block 155, and is actuated through a lever 1 51 fulc-rumed at 152 in a forked extension 163 of the valve block 156. One end of the lever 161 has a fork 164 embracing pin 165 mounted in one end of the valve 157. The opposite end of lever 151 carries a cam roller 166, which is arranged in a plane parallel to the cam 145. A second cam roller 157 is also mounted on the lever 161 and in a second plane parallel to the cam 145a but vertically displaced from the plane containing the earn 145.

The fluid control system specific to the actuation of the mechanisms of this present invention is set forth schematically in PEG. and operates as follows:

As a starting point, it will be assumed that the mechanical parts are in the position indicated in FIG. 15, which is the time just after the gobs have been received in parison mold cavities 25. The valve 157 has been positioned (as shown) by the cam 145 to permit fluid pressure to pass from the pressure line 168 and pressure chamber 169 through relieved portion 159 of the valve 157 into conduit 17 0. This pressure enters behind the power rack 1113, moving same outwardly to the position shown in FIG. 15, rotating the gear 110, its shaft 165 and the lever 104. The movement of this lever 1134 and its cam roll 1113 in cam slot 1112 will cause the slides 58 and their plungers 32 to move to the position shown in full lines in FIG. 15 and the power rack 1119 to move to the position shown in FIG. 15. In this position the plungers 32 will be in vertical alignment with and between the gob guides 43 and the parison mold cavities and ready for movement downwardly to the glass pressing position. Fluid from behind power rack 199 is forced out through conduit 171, relieved portion 133 in valve 128 into conduits 172 and 173 to exhaust past relieved portion 160 in valve 157 into the exhaust chamber 174- of the valve block 155. With completion of the stroke of rack 193, the pressure from conduit 170 then passes through conduit 144 into chamber 175 behind the valve 137, thus moving the same to the position shown in FIGS. 5 and 15. This permits the conduit 143.

them to move downwardly, thereby carrying the slides and their plungers 32 into glass pressing position. The fluid beneath the pistons 51 and 52 is exhausted first through conduits 183 and 134 but when the pistons 51 and 52 pass the exit openings for these two conduits, the fluid will pass out through conduits 135 and 136, through needle valves 13?, into conduit 133. Conduit 133 leads to the valve 137 where the exhausting fluid will flow past the relieved portion 139 of valve 137. This exhausting fluid will pass to a conduit 1553 through an adjustable needle valve 189. With the plungers 32 in down position, the snubber valve 123 will move upwardly as the roller 17 moves downwardly due to the constant pressure supplied to pin 131 by a conduit 1% connected to chamber 132, and this movement of valve 128 will disconnect conduit 117 from conduits 172 and 173 which lead to and from the control valve 157. As best shown in FIG. 16, this movement will also connect conduits 1% and 143 through relieved portion 134 in valve 128 and thus bypass chec valve 176. With the completion of the pressing operation, the control valve 157 in valve block 156 will be shifted by cam to permit pressure from the pressure chamber 169 to pass through relieved portion 160 of valve 157 and into conduit 1'73. This pressure will force the slide valve 137 to move to the right from the position shown in FIG. 15 and to exhaust fluid through conduits and 17h. Constant pressure fluid from main supply line 141 then passes through relieved portion 139 of valve 137 into conduit 133 and enters beneath the pistons 51 and 52, raising the plungers 32 from glass pressing position. The fluid from above the pistons 51 and 52 is exhausted through conduits 181 and 132 and the pressure regulators 179 and 1311 into conduit 177. The fluid then bypasses the check valve 176 through conduit 191, passes through the relieved portion 134 of the snubber valve 123 (as illustrated in FIG. 16) into the conduit 143 and through relieved portion of valve 137 to exhaust through a needle valve 192. The vertical shaft which provides the power for shifting the slides 5% in their horizontal movement is attached to the slidevvay 33 and moves therewith during its vertical movement to and from glass pressing position. The final portion of the upstroke of the pistons 51 and 52 will therefore carry the upper end of the shaft member 1115 into contact with the roller 11'! of lever 115. The lever 115, which is con nected to the snubber valve 128 by link 127, will rock and move the valve 128 downwardly resulting in a pinching off of the flow of exhaust fluid from conduit 1% to The feathering spot 135 on the valve 123 will prevent creep-up of the plungers 32; prior to the valve shifting and the feathering spot 136 functions to regulate the exhaust of the fluid to a gradual rather than an abrupt shut off at the end of the downward movement of valve 123. The relieved portion 133 will then permit fluid to 110W from the supply conduit 173 through conduits 172 and 171 and enter behind the power rack 1119, thereby rotating the gear 111 shaft 105, and through the earn 1% returns the slides 511 and their plungers 32 to their inactive or out of alignment position, as shown by the dotted line position in FIG. 15. This movement also places the intermediate gob guides 95'' into alignment ready to guide the next pair of gobs into the blank mold cavities 25.

Referring to FIGS. 8 to 10, there is shown a safety mechanism for protecting the nachine operator when working in the area between the plungers $2 and the parison mold it is necessary for the operator to work in this area when replacing the plungers or molds as they become worn through extensive use. At these times, the machine is turned off and the source of pressure fluid to the machine is closed. To provide access to this area, it is desirable to have the plungers raised. With the operating pressure discontinued, the plungers 32, the slides 55, and slideways 33 will tend to move downwardly by reason of their mass and lack of pressure to sustain them in their up position. To prevent the plungers 32 from dropping when the pressure is cut off to the machine, a pair of locking detents 193 are engaged in teeth 19% carried by a pair of piston-like members 3195 slidable in vertical passages 1% in the overlying support member 56. These piston-like members 195 are connected at their lower ends to the slideways 33 by a suitable connector 197. The two detents 193 are joined together by a flat bar 193. As best seen in FIG. 9, a spring forces the bar 1% and detents 193 toward the piston-like members 195. This spring force is normally offset by the application of the machine operating pressure at Til to a piston 201 whose operating end is in opposed abutting relationship to the bar 198 and spring 199. Thus it can be seen that as long as the operating pressure is connected to the machine, the detents 193 will be out of engagement with the piston-like members 195, but when the pressure is cut off, the detents 193 will engage the piston-like members 195 and hold the plungers 32 in raised position and prevent them from dropping.

A general summary of the operation of the mechanisms forming this present invention is approximately as follows:

The driving motor for the gob feeding device is interconnected to the motor drive 155 of the drum by a synchronizing motor drive so that the timing of the two mechanisms will be automatically synchronized.

A pair of gobs 39 of molten glass will be suspended beeath the feeder it) and the shears 12, actr -.ted by the cylinder 13, will sever and drop said gobs into the curved sections of the gob guides 49 positioned below and in alignment with the suspended gobs. The gobs continue to fall by gravity, passing along inclined sections 41 to the dellcctor sections 42 and then into the stationary gob guide sections 43 and intermediate gob guide sections g8 positioned above and in alignment with a pair of blank mold cavities 25 (PTGS, 1 and 14). At about the time the gobs 39 are ready to issue from the lower end of the sections 43 to enter into guides 9 the blank mold 24 will have reached its uppermost position in contact with the neck mold 23. Within a fraction of a second, these same gobs 39 are in the, cavities of the blank mold 2d. The blank mold 24- is moved up under control of the pressure cylinder 29. The cam 145 will then position control valve 157 to admit pressure to the conduit 179 and to the power rack 198 to rotate shaft 105 and move the slides and plungers 32 horizontally into vertical alignment with the stationary gob guide sections 43 and the blank mold cavities 25'. This same motion of shaft 195 will, through rack 191, gears 11% and 99, rotate shaft 97 and through cam roller 95 move the intermediate gob guides 59 out of alignment with the mold cavities.

Concomitant with this horizontal movement of the plungers, fluid pressure enters conduit 144 to shift valve 137 so as to admit fluid under pressure to conduit 143 and thence to the top ends of pistons 51 and 52. This pressure to these pistons will move the slideways 33, the slides 59 and their attached plungers 32 downward into glass pressing relationship with respect to the mold under a pressure sufilcient to press the molten glass and form in the combined neck and blank molds a pair of parisons or alternatively, a finally shaped glass article.

With the completion of the pressing or shaping operation, the control valve 157 will be shifted by the cam 145 to supply fluid pressure to conduit 173 and shift valve 137 to provide pressure fluid from conduit 141 to conduits 183 and 134 at the bottom of pistons 51 and 52 and start rais ing the plungers 32 and slides 54 from the glass shaping position.

As the slideways 33 move upwardly, they carry the shaft H 5 upwardly also and as this shaft reaches the latter portions of its upward movement, it is automatically interconnected to valve 128 and causes this valve to move downwardly. This downward movement of the valve 128 stops fluid in conduits 181 and 132 from passing to con 7 l2 duit l i-3 and exhausting through valve 1%. This illustrates the snubbing action of valve 123. This movement of valve 123 also allows pressure fluid to flow from the control valve 157, through conduits 173, 172 and 171 to shift the power rack lt tl and thereby rotate shafts Hi5 and 97 in a direction to move the plungers 32 horizontally to their inactive position and bring the intermediate gob guide sections to their active position in alignment with the vertical gob guides 43 and the mold cavities 25.

At the same time as the plungers 69 are moving upwardly, the blank molds 24 are being moved downwardly away from the pressed glass, their movement being controlled by the supply of fluid pressure through conduit 34) to move piston 28 and the blank molds 24 downwardly.

When the plungers 32. and the blank molds 24, in their relative vertical movements, have both moved ertically a sumcient distance to cl ar the pressed glass, the turret 42 will be indexed to bring a successive set of neck molds to the glass pressing station. At this time the several mechanisms will be in the position shown in FIGS. 4 and 14, i.e., ready to commence a succeeding molding cycle and perform the several operations in seriatum.

Modifications may be resorted to within the spirit and scope of the appended claims.

We claim:

1. A mechanism for delivering to and shaping successive charges of molten glass in a shaping mold, comprising in combination a base, an upper support member mounted on said base, said upper support member having a vertical opening therethrough, a vertically disposed stationary gob guide section mounted in said opening, a glass shaping mold mounted on said base beneath and in vertical alignment with said stationary gob guide section, a vertically disposed movable intermediate gob guide section, means connected to said upper support member for supporting said intermediate gob guide section between said stationary gob guide section and said shaping mold, a vertically disposed glass shaping plunger, means connected to said upper support member for supporting said plunger between said stationary section and said mold, the vertical axis of said plunger being parallel to said intermediate section, means extending out of said upper support member and connected to said first mentioned means for laterally shifting said intermediate section into and out of alignment with said stationary section, motor means mounted in said upper support member and connected to said second mentioned means for laterally shifting said plunger into and out of vertical alignment with said mold, means mounted in said upper support member and inter-connecting the inner ends of said shifting means for effecting concurrent lateral movement of said plunger and said intermediate section, means for elevating and retracting said mold into and out of position to receive the charges of molten glass, a source of fluid under pressure, hydraulically actuated means mounted in said upper support member and connected to said plunger supporting means, means responsive to movement of said plunger into vertical alignment with the mold for connecting said source of fluid under pressure to said hydraulically actuated means for forcing the plunger downward into the mold, and pressure regulating means interposed said source of fluid under pressure and said hydraulically actuated means for controlling the pressing force of said plunger.

2. In a mechanism for delivering to and shaping successive charges of molten glass in a shaping mold, comprising in combination a base, an upper support member mounted above said base, a bearing housing having a vertical cylindrical bore therethrough, mounted in said upper support member, a tubular sleeve member slidably received in said bore and extending below said upper support member, a stationary gob guide section connected to said upper support member and extending telescopically within said sleeve, a horizontal slideway formed on the lower end of said tubular sleeve, a slide mounted in said slideway for horizontal reciprocation, a depending plunger attached to said slide, means extending out of said upper support member and connected to said slide for moving said slide and plunger into and out of vertical alignment with said stationary guide section, a first fluid motor mounted in said upper support member and connected to said means for moving said slide, a shaping mold below and in alignment with stationary guide section, means mounted on said base and connected to said mold for elevating and retracting said shaping mold, second fluid motor means mounted in said upper support member and connected to said slideway for vertically reciprocating said slideway and plunger, a source of fluid under pressure, means connecting said source of fluid to said first fluid motor and means responsive to actuation of said first fluid motor a predetermined amount for connecting said source of fluid under pressure to said second fluid motor means.

3. In a mechanism for successively shaping plural charges of molten glass in a plural cavitied shaping mold, comprising in combination a base, an upper structure support member mounted above said base, a horizontal rota table turret, a plurality of pairs of neck molds carried by said turret, means connected to the center of said turret and extending downward from said support member for supporting and rotating said turret, a pair of vertically disposed stationary gob guide sections mounted in and extending through said support member in alignment with a pair of neck molds carried by said turret, a pair of vertically disposed axially movable sleeve members mounted in said support member, said sleeve members surrounding said guide sections, a horizontal slideway formed on the lower end of each sleeve member, a slide mounted in each slideway, a shaping plunger connected to and depending from each slide, means for horizontally shifting said slides and plungers relative to said slideways into and out of alignment with and between said guide sections and neck molds, a shaping mold having a pair of cavities therein, means for mounting said shaping mold on said base for vertical reciprocation toward and away from said neck molds, reciprocating piston type fluid motor means mounted in said upper structure suppont member and having their pistons connected to said slideways for lowering and raising said plungers, slides and slideways relative to said neck molds, a source of fluid under pressure, an exhaust passage, shiftable valve means for alternately connecting opposite ends of said motor means to said fluid pressure source and said exhaust passage respectively, fluid pressure regulating means interposed said source of fluid under pressure and the upper ends of said fluid motor means for controlling the pressing force of said plungers, a snubber valve connected to the upper ends of said motor through which fluid passes to said exhaust passage on the upward stroke of said piston motor means, and adjustable connecting means connected to a slideway for shifting said snubber valve in response to a predetermined upward movement of said slideway for cutting off the ex- 14 haust of fluid from said motor means whereby said upward movement of said slideways and plungers is controlled.

In a mechanism for successively shaping plural charges of molten glass in a plural cavitied shaping mold, comprising in combination a base, an upper structure support member mounted above said base, a horizontal rotatable turret, a plurality of pairs of neck molds carried by said turret, means connected to the center of said turret and extending downward from said support member for supporting and rotating said turret, a pair of vertically disposed stationary gob guide sections mounted in and extending through said support member in alignment with a pair of neck molds carried by said turret, a pair of vertically disposed axially movable sleeve members mounted in support member, said sleeve members surrounding said guide sections, a horizontal slideway formed on the lower end of each sleeve member, a slide mounted in each slideway, a shaping plunger connected to and depending from each slide, means for horizontally shifting said slides and plungers relative to said slideways into and out of alignment between said guide sections and neck molds, a shaping mold having a pair of cavities therein, means for mounting said shaping mold on said base for vertical reciprocation toward and away from said neck molds, doubleacting fluid pressure actuated means connected to said slideways for lowering and raising said plungers, slides and slideways relative to said neck mold-s, a source of fluid under pressure, an exhaust passage, means for connecting said source to said pressure actuated means to alternately raise and lower said plungers, means for alternately connecting the pressure actuated means to said exhaust passage, fluid pressure regulating means interposed between said source and said pressure actuated means for regulating the pressing force of said plungers, a snubber valve in said exhaust passage and means responsive to movement of said slideways in an upward direction a predetermined distance for shifting said snubber valve into position for cutting off the exhaust of fluid from said pressure actuated means whereby said slideways and plungers are controlled in their upward movement.

References Cited by the Examiner UNITED STATES PATENTS 1,679,848 8/28 Barker 65223 1,852,570 4/32 Hofrnann 65-224 1,982,103 11/34 Hiller 65-76 2,224,767 12/40 Du Bois 65221 2,225,948 12/40 Beatty 65-64 2,282,449 5/42 Bert 65223 2,732,665 1/56 Cassell 65223 2,984,047 5/61 Mennitt et al 65-222 DONALL H. SYLVESTER, Primary Examiner.

F ARTHUR P. KENT, MORRIS O. WOLK, Examiners. 

1. A MECHANISM FOR DELIVERING TO AND SHAPING SUCCESSIVE CHARGES OF MOLTEN GLASS IN A SHAPING MOLD, COMPRISING IN COMBINATION A BASE, AN UPPER SUPPORT MEMBER MOUNTED ON SAID BASE, SAID UPPER SUPPORT MEMBER HAVING A VERTICAL OPENING THERETHROUGH, A VERTICALLY DISPOSED STATIONARY GOB FUIDE SECTION MOUNTED IN SAID OPENING, A GLASS SHAPING MOLD MOUNTED ON SAID BASE BENEATH AND IN VERTICAL ALIGNMENT WITH SAID STATIONARY GOB GUIDE SECTION, A VERTICALLY DISPOSED MOVABLE INTERMEDIATE GOB GUIDE SECTION, MEANS CONNECTED TO SAID UPPER SUPPORT MEMBER FOR SUPPORTING SAID INTERMEDIATE GOB GUIDE SECTION BETWEEN SAID STATIONARY GOB GUIDE SECTION AND SAID SHAPING MOLD, A VERTICALLY DISPOSED GLASS SHAPING PLUNGER, MEANS CONNECTED TO SAID UPPER SUPPORT MEMBER FOR SUPPORTING SAID PLUNGER BETWEEN SAID STATIONARY SECTION AND SAID MOLD, THE VERTICAL AXIS OF SAID PLUNGER BEING PARALLEL TO SAID INTERMEDIATE SECTION, MEANS EXTENDING OUT OF SAID UPPER SUPPORT MEMBER AND CONNECTED TO SAID FIRST MEMTIONED MEANS FOR LATERALLY SHIFTING SAID INTERMEDIATE SECTION INTO AND OUT OF ALIGNMENT WITH SAID STATIONARY SECTION, MOTOR MEANS MOUNTED IN SAID UPPER SUPPORT MEMBER AND CONNECTED TO SAID SECOND MENTIONED MEANS FOR LATERALLY SHIFTING SAID PLUNGER INTO AND OUT OF VERTICAL ALIGNMENT WITH SAID MOLD, MEANS MOUNTED IN SAID UPPER SUPPORT MEMBER AND INTER-CONNECTING THE INNER ENDS OF SAID SHIFTING MEANS FOR EFFECTING CONCURRENT LATERAL MOVEMENT OF SAID PLUNGER AND SAID INTERMEDIATE SECTION, MEANS FOR ELEVATING AND RETRACTING SAID MOLD INTO AND OUT OF POSITION TO RECEIVE THE CHARGES OF MOLTEN GLASS, A SOURCE OF FLUID UNDER PRESSURE, HYDRAULICALLY ACTUATED MEANS MOUNTED IN SAID UPPER SUPPORT MEMBER AND CONNECTED TO SAID PLUNGER SUPPORTING MEANS, MEANS RESPONSIVE TO MOVEMENT OF SAID PLUNGER INTO VERTICAL ALIGNMENT WITH THE MOLD FOR CONNECTING SAID SOURCE OF FLUID UNDER PRESSURE TO SAID HYDRAULICALLY ACTUATED MEANS FOR FORCING THE PLUNGER DOWNWARD INTO THE MOLD, AND PRESSURE REGULATING MEANS INTERPOSED SAID SOURCE OF FLUID UNDER PRESSURE AND SAID HYDRAULICALLY ACTUATED MEANS FOR CONTROLLING THE PRESSING FORCE OF SAID PLUNGER. 